CN217956041U - Battery pack - Google Patents

Abstract

The utility model relates to the technical field of power batteries, in particular to a battery pack. The battery pack includes: a cell cavity, suitable for accommodating the cells; a water-cooled plate, disposed relatively below the cell cavity, and suitable for directly or indirectly contacting the cells; a BDU cavity, independent of the cell cavity and Adjacent to each other, the BDU cavity is provided with a BDU module suitable for electrical connection with the battery cell; the BMS cavity is independent from the battery cavity and is adjacent to each other, and the BMS cavity is provided with a BMS module suitable for communication with the battery cell. A liquid inlet and outlet suitable for communicating with the liquid inlet and outlet pipes of the water cooling plate are also arranged inside. The battery pack provided by the utility model makes the liquid inlet and outlet pipes of the water-cooled plate not located in the same chamber as the battery cell, so that when the coolant leaks, it is not easy to cause a short circuit of the battery cell and avoid serious damage to the electrical equipment of the vehicle. Through reasonable layout, safety is ensured and space waste is avoided.

Description

a battery pack

technical field

The utility model relates to the technical field of power batteries, in particular to a battery pack.

Background technique

As an important part of the power plant, the battery pack often needs to be rationally arranged to increase the energy density of the battery pack while meeting the necessary safety requirements. The battery packs in the prior art often need to be equipped with a water-cooled plate structure, and the water inlet and outlet of the water-cooled plate structure are often located in the same chamber as the battery cell. When the coolant leaks, it is easy to cause a short circuit of the battery cell, resulting in a vehicle electrical failure. Serious damage to equipment.

Utility model content

Therefore, the technical problem to be solved by the utility model is to overcome the defect in the prior art that the battery cell is easily short-circuited when the coolant leaks, thereby providing a battery pack that avoids direct contact with the battery cell when the coolant leaks.

In order to solve the above technical problems, the utility model provides a battery pack, including:

The cell cavity is suitable for accommodating the cells;

The water cooling plate is arranged relatively below the cell cavity, and is suitable for being in direct or indirect contact with the cell;

The BDU cavity is independent from and adjacent to the cell cavity, and a BDU module suitable for being electrically connected to the cell is arranged in the BDU cavity;

The BMS cavity is independent from and adjacent to the cell cavity, and a BMS module suitable for communicating with the cell is provided in the BMS cavity, and a BMS module suitable for communicating with the water cooling plate is also provided in the BMS cavity. The liquid inlet and outlet that the liquid inlet and outlet pipes are connected with each other.

Optionally, the BMS chamber is adapted to form an independent and closed chamber after the cover is closed.

Optionally, N cells are arranged in the cavity of the cell, and the N cells are connected in series via a bus bar, and at least two of the cells are connected in series with fuses, where N is positive integer.

Optionally, when N is an even number, the fuse is located between the N/2th battery cell and the N/2+1th battery cell.

Optionally, the fuse is arranged in the cell cavity, and is located at an end of the cell cavity away from the BDU cavity.

Optionally, the safety bottom is provided with a bracket, and the bracket is fixedly connected to the tail end beam in the cell cavity;

The two ends of the insurance are connected to the bus bar through a transfer bar.

Optionally, the cell cavity, the BDU cavity and the outer peripheral sides of the BMS cavity are jointly surrounded by side beams;

Any two adjacent chambers of the cell cavity, the BDU cavity, and the BMS cavity are separated by partition beams.

Optionally, the electric core located at the head end of the series is electrically connected to the first terminal of the BDU module via the first conductive bar; the electric core located at the end of the series is electrically connected to the second terminal of the BDU module via the second conductive bar. terminal electrical connection;

A relief notch is formed on the partition beam located between the BDU cavity and the cell cavity, and the relief notch is suitable for forming a relief for the first conductive row and/or the second conductive row bit.

Optionally, at least one longitudinal beam and at least one crossbeam are arranged in the cell cavity, the longitudinal beam and the crossbeam are vertically intersected, and the crossing positions of the longitudinal beam and the crossbeam are respectively recessed and formed There are longitudinal beam notches and cross beam notches, and the longitudinal beam notches are buckled and connected with the cross beam notches.

Optionally, the battery pack also includes:

A connecting piece, the connecting piece is suitable for connecting at least one end of the longitudinal beam with the inner side wall of the side beam.

The technical scheme of the utility model has the following advantages:

1. The battery pack provided by the utility model, by making the BMS chamber and the cell chamber independent and adjacent to each other, and setting the liquid inlet and outlet in the BMS chamber, the liquid inlet and outlet pipes of the water cooling plate are connected with the liquid inlet and outlet, so that The liquid inlet and outlet pipes of the water-cooled plate are not located in the same chamber as the battery core, so that in the event of a coolant leakage accident, it is not easy to cause a short circuit of the battery core and avoid serious damage to the electrical equipment of the vehicle. The safety is ensured through a reasonable layout. Reasonable use of space to avoid space waste.

2. The battery pack provided by the utility model can support and fix the insurance by providing a bracket at the bottom of the insurance. Further, the bracket is fixedly connected to the tail end beam in the cell cavity, so that It can ensure that the bracket is firmly fixed, thereby enabling the insurance to be firmly fixed, and the insurance can be closer to the battery core to facilitate conduction and connection.

3. In the battery pack provided by the utility model, the crossing positions of the longitudinal beam and the cross beam are respectively recessed to form a longitudinal beam gap and a cross beam gap, so that the mutual positioning of the longitudinal beam and the cross beam can be realized conveniently, and the clamping connection can be realized. And it can avoid the intersection position of the longitudinal beam and the cross beam protruding too high, so as to control the overall height of the battery pack.

Description of drawings

In order to more clearly illustrate the specific implementation of the utility model or the technical solutions in the prior art, the accompanying drawings that need to be used in the description of the specific implementation or the prior art will be briefly introduced below. Obviously, the following descriptions The accompanying drawings are some implementations of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without any creative work.

Fig. 1 is the top view of the utility model battery pack;

Fig. 2 is a schematic diagram of a first viewing angle of the battery pack of the present invention;

Figure 3 is an enlarged view of A in Figure 2;

Fig. 4 is a schematic diagram of a disassembled state of the beam of the battery pack of the present invention;

Fig. 5 is the enlarged view of place B in Fig. 4;

Fig. 6 is a schematic diagram of a second viewing angle of the battery pack of the present invention;

Figure 7 is an enlarged view at C in Figure 6;

Fig. 8 is a partial schematic diagram of the battery pack of the present invention.

Explanation of reference signs:

1-cell cavity, 2-BDU cavity, 3-BMS cavity, 4-water cooling plate;

11-battery core, 12-insurance, 13-bracket, 14-bus bar, 15-transfer bar, 16-longitudinal beam, 161-longitudinal beam gap, 162-passing line gap, 17-beam, 171-beam gap, 18-connector;

21-BDU module, 22-gap; 31-BMS module, 32-inlet and outlet, 41-inlet and outlet pipe;

51-the first conductive row, 52-the second conductive row, 53-the third conductive row, 54-the fourth conductive row;

61-edge beam, 62-end beam, 63-partition beam.

detailed description

The technical solutions of the utility model will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are part of the embodiments of the utility model, but not all of them. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" etc. The orientation or positional relationship indicated is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, use a specific Azimuth configuration and operation, therefore, should not be construed as limiting the invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and should not be construed as indicating or implying relative importance.

In the description of the present utility model, it should be noted that, unless otherwise clearly stipulated and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a flexible connection. Detachable connection, or integral connection; it can be mechanical connection or electrical connection; it can be direct connection or indirect connection through an intermediary, and it can be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present utility model according to specific situations.

In addition, the technical features involved in different embodiments of the present invention described below can be combined with each other as long as they do not constitute conflicts with each other.

Example

As shown in FIG. 1-FIG. 8, the battery pack provided in this embodiment includes:

The cell cavity 1 is suitable for accommodating the cell 11;

The water-cooled plate 4 is arranged relatively below the cell cavity 1 and is suitable for directly or indirectly contacting the cell 11;

The BDU cavity 2 is independently and adjacent to the battery cavity 1, and the BDU cavity 2 is provided with a BDU module 21 suitable for electrical connection with the battery cell 11;

The BMS cavity 3 is independent and adjacent to the cell cavity 1, and a BMS module 31 suitable for communicating with the cell 11 is arranged in the BMS cavity 3, and a suitable BMS module 31 is arranged in the BMS cavity 3. The liquid inlet and outlet 32 connected with the liquid inlet and outlet pipe 41 of the water cooling plate 4 .

It should be noted that the BMS module 31 can be a battery management system (BMS). The BMS is a system for monitoring and controlling the battery. It is used to collect battery information and provide real-time feedback. The connection between the BMS and the battery cell can be a weak current communication connection , can also be connected for wireless communication. The BDU module 21 can be a battery energy distribution unit (BDU). The BDU is directly connected to the power battery through a high-voltage plug-in, and controls the charging and discharging process of the battery pack. It is a crucial component in the high-voltage circuit.

In the battery pack provided in this embodiment, the BMS chamber 3 and the cell chamber 1 are arranged independently and adjacent to each other, and a liquid inlet and outlet 32 is provided in the BMS chamber 3, so that the liquid inlet and outlet pipe 41 of the water cooling plate 4 and the liquid inlet and outlet 32 so that the liquid inlet and outlet pipes 41 of the water-cooled plate are not located in the same chamber as the battery cell, so that when the coolant leaks, it is not easy to cause a short circuit of the battery cell and avoid serious damage to the electrical equipment of the vehicle. , to ensure safety, and at the same time make reasonable use of space to avoid space waste.

Specifically, the BMS chamber 3 is adapted to form an independent and closed chamber after the cover is closed. By forming an independent and closed chamber after the BMS cavity 3 is covered with a cover plate, the sealing of the BMS cavity 3 can be ensured, and the cooling liquid will not overflow into the cell cavity when a leakage accident occurs.

Specifically, N battery cells 11 are arranged in the battery cell chamber 1, and the N battery cells 11 are connected in series via a bus bar 14, and fuses are connected in series between at least two of the battery cells 11. 12, where N is a positive integer. By connecting the fuse 12 in series between at least two of the cells 11 , the fuse 12 can cut off the conduction of the circuit when an overcurrent occurs in the cells in series, thereby ensuring the overall safety of the cells 11 .

Specifically, when N is an even number, the fuse 12 is located between the N/2th battery cell 11 and the N/2+1th battery cell 11 . As shown in FIG. 1 , in this embodiment, there are three rows of six battery packs in total in the cell cavity 1, and the six battery packs are connected in series in sequence, and the insurance 12 is set in the N/2th battery pack. between the cell 11 and the N/2+1th cell 11, so that the fuse 12 can be located in the middle of the cell in series.

Specifically, the fuse 12 is disposed in the cell cavity 1 and is located at an end of the cell cavity 1 away from the BDU cavity 2 . As shown in FIG. 1 , in this embodiment, the fuse 12 is arranged in the cell cavity 1 and is located at the end of the cell cavity 1 away from the BDU cavity 2, that is, the fuse 12 is located at the battery The end of the pack, and specifically the end of the middle row of battery packs.

Specifically, the bottom of the insurance 12 is provided with a bracket 13, and the bracket 13 is fixedly connected to the tail beam 62 in the cell chamber 1;

Both ends of the fuse 12 communicate with the bus bar 14 via an adapter bar 15 .

The bracket 13 is provided at the bottom of the insurance 12, so that the insurance 12 can be supported and fixed, and further the bracket 13 is fixedly connected to the tail end beam 62 in the cell chamber 1, so that the bracket can be fixed It is reliable, so that the insurance 12 can be firmly fixed, and the insurance 12 can be closer to the battery core, so as to facilitate the conduction connection.

As shown in FIG. 3 , the two ends of the insurance 12 are connected with an adapter bar 15 , and the adapter bar 15 communicates with the bus bar 14 on the two battery cells arranged horizontally. As a deformation, the adapter bar 15 and the bus bar 14 may be integrally formed conductive structures.

Specifically, the cell cavity 1, the BDU cavity 2 and the BMS cavity 3 are surrounded by side beams 61;

Any two adjacent chambers of the cell chamber 1 , the BDU chamber 2 and the BMS chamber 3 are separated by partition beams 63 .

By setting the partition beam 63 , any two adjacent chambers of the cell chamber 1 , the BDU chamber 2 and the BMS chamber 3 can be separated so as to form independent chambers.

Specifically, the battery cell 11 at the head end of the series is electrically connected to the first terminal of the BDU module 21 through the first conductive bar 51; the battery cell 11 at the end of the series is connected to the BDU module through the second conductive bar 52 The second terminal of the module 21 is electrically connected;

A relief gap 22 is formed on the partition beam 63 between the BDU chamber 2 and the cell chamber 1, and the relief gap 22 is suitable for the first conductive row 51 and/or the The second conductive row 52 is formed to give way.

By forming a relief gap 22 on the partition beam 63 between the BDU cavity 2 and the cell cavity 1, it is convenient to move the first conductive row 51 and/or the second conductive row 52 layout to avoid occupying the height space of the battery pack.

Specifically, at least one longitudinal beam 16 and at least one crossbeam 17 are arranged in the cell cavity 1, the longitudinal beam 16 and the crossbeam 17 are vertically intersected, and the longitudinal beam 16 and the crossbeam 17 A longitudinal beam notch 161 and a cross beam notch 171 are respectively recessed at the intersection positions, and the longitudinal beam notch 161 and the cross beam notch 171 are buckled and connected.

Optionally, the positions of the longitudinal beam 16 and the cross beam 17 can be reasonably adjusted according to the size of the battery pack, so as to adapt to battery packs of different sizes, so as to adjust the size of each cell, so as to be applicable to different types of batteries Group, in order to realize the platform and modular layout of the battery pack.

The crossing positions of the longitudinal beam 16 and the cross beam 17 are respectively recessed to form a longitudinal beam notch 161 and a cross beam notch 171, so that the mutual positioning of the longitudinal beam 16 and the cross beam 17 can be realized conveniently, and the clamping can be realized, and the longitudinal beam can be avoided. The intersecting position of the beam 16 and the cross beam 17 protrudes too high, so as to control the overall height of the battery pack.

Optionally, as shown in FIG. 7 , when the battery packs in the cell cavity 1 are three rows, the last battery cell connected in series in the first row of battery packs is connected to the first battery cell connected in series in the second row of battery packs. The last battery cell connected in series in the second row of battery packs is connected with the first battery cell connected in series in the third row of battery packs through the fourth conductive bar 54 . Optionally, the longitudinal beam 16 is further provided with a wire passing notch 162 , and the wire passing notch 162 is suitable for making way for the arrangement of the third conductive row 53 or the fourth conductive row 54 .

Specifically, the battery pack also includes:

The connecting piece 18 is suitable for connecting at least one end of the longitudinal beam 16 with the inner side wall of the side beam 61 .

One end of the connecting piece 18 is fixed on the end of the longitudinal beam 16, and the other end can be fixedly connected to the inner side wall of the side beam 61, and specifically, the connecting piece 18 includes a joint that is clamped on the longitudinal beam 16 along the thickness direction. The clamping pieces on both sides are provided with threaded holes, so as to be fixedly connected with the corresponding threaded holes on the longitudinal beam 16; the connecting piece 18 also includes a vertically arranged The fixing piece is provided with threaded holes, so as to be fixedly connected with the correspondingly provided threaded holes on the side beam 61 ; thereby realizing the fixed connection between the longitudinal beam 16 and the side beam 61 .

Apparently, the above-mentioned embodiments are only examples for clear description, rather than limiting the implementation. For those of ordinary skill in the art, other changes or changes in different forms can be made on the basis of the above description. It is not necessary and impossible to exhaustively list all the implementation manners here. And the obvious changes or variations derived therefrom are still within the scope of protection of the utility model.

Claims (10)

1. A battery pack, characterized in that, comprising: The cell cavity (1), suitable for accommodating the cell (11); The water cooling plate (4) is arranged relatively below the cell cavity (1), and is suitable for directly or indirectly contacting the cell (11); The BDU cavity (2) is independently and adjacent to the cell cavity (1), and a BDU module (21) suitable for electrical connection with the cell (11) is arranged in the BDU cavity (2); The BMS cavity (3) is independent from and adjacent to the cell cavity (1), and a BMS module (31) suitable for communicating with the cell (11) is arranged in the BMS cavity (3), A liquid inlet and outlet (32) adapted to communicate with the inlet and outlet pipes (41) of the water cooling plate (4) is also provided in the BMS cavity (3). 2. The battery pack according to claim 1, characterized in that, the BMS chamber (3) is adapted to form an independent and closed chamber after the cover plate is closed. 3. The battery pack according to claim 1, characterized in that, N cells (11) are arranged in the cell chamber (1), and N cells (11) are connected via a bus bar ( 14) Connected in series, and a fuse (12) is connected in series between at least two of the cells (11), wherein N is a positive integer. 4. The battery pack according to claim 3, characterized in that, when N is an even number, the insurance (12) is located between the N/2th battery cell (11) and the N/2+1th battery cell (11). between the batteries (11). 5. The battery pack according to claim 4, characterized in that, the insurance (12) is arranged in the cell cavity (1), and is located in the cell cavity (1) away from the BDU cavity ( 2) at one end. 6. The battery pack according to claim 5, characterized in that, the bottom of the insurance (12) is provided with a bracket (13), and the bracket (13) is fixedly connected to the tail end in the battery cavity (1). on the end beam (62); Both ends of the fuse (12) communicate with the bus bar (14) via an adapter bar (15). 7. The battery pack according to any one of claims 1-6, characterized in that, the outer peripheral sides of the cell cavity (1), the BDU cavity (2) and the BMS cavity (3) are jointly composed of Side beams (61) are enclosed; Any two adjacent chambers of the cell chamber (1), the BDU chamber (2) and the BMS chamber (3) are separated by partition beams (63). 8. The battery pack according to claim 7, characterized in that, the battery cell (11) at the head end of the series is electrically connected to the first terminal of the BDU module (21) via a first conductive bar (51); The electric core (11) at the end of the series is electrically connected to the second terminal of the BDU module (21) via the second conductive bar (52); A relief gap (22) is formed on the partition beam (63) between the BDU chamber (2) and the cell chamber (1), and the relief gap (22) is suitable for the The first conductive row (51) and/or the second conductive row (52) form a relief. 9. The battery pack according to claim 7, characterized in that at least one longitudinal beam (16) and at least one crossbeam (17) are arranged in the cell cavity (1), and the longitudinal beam (16) ) and the crossbeam (17) are vertically intersected, and the intersection positions of the longitudinal beam (16) and the crossbeam (17) are respectively recessed to form a longitudinal beam notch (161) and a crossbeam notch (171). The beam notch (161) is fastened and connected with the beam notch (171). 10. The battery pack according to claim 9, wherein the battery pack further comprises: A connecting piece (18), the connecting piece (18) is suitable for connecting at least one end of the longitudinal beam (16) with the inner side wall of the side beam (61).

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